SNOM Observations of Surface Plasmon Polaritons on Metal Heterostructures

我们与一台散布类型的扫描近地的光显微镜(SNOM ) 在一件 metalheterostructured 样品上观察表面电浆子电磁声子(SPP ) 折射。Thesample 由其边界与合适的蚀刻的时间足够光滑的艾尔和 Au 在里面飞机组成。到边界和 SPP 的部分的艾尔电影旅行上的 SPPsexcited 宣传进 Au 电影。Inaddition，干扰穗在边界出现在 SNOM 图象偏好。结果与有效索引方法被分析，测定角度被解释由敏捷的法律。

We observe surface plasmon polariton （SPP） refraction on a metal heterostructured sample with a scattered-type scanning near-field optical microscope （SNOM）. The sample consists of AI and Au in-plane whose boundary is smooth enough with proper etching time. SPPs excited on the AI film travel to the boundary and a portion of SPPs propagates into the Au film. In addition, interference fringes appear in the SNOM image bent at the boundary. The result is analysed with effective index method and the refracted angle is explained by Shell＇s law.